Well, in the case when you use the mytable
CSS class in your stylesheet, the CSS rules will be applied only
to those tables, which have this CSS class
. The pickers, Calendar and TimeView do not have this class by default, but you can add it if you want to.
However, if I am not mistaken, your custom styles are not
targeted at the pickers and their popups, but at some other tables in your pages. So now you have to add the mytable
CSS class to the desired tables.
Let us know if you need further advice.
the Telerik team